[llvm] [Mips] Fix clang crashes when compiling a variadic function while targeting mips3 (PR #130558)

[via llvm-commits]

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+; RUN: llc -mtriple=mipsel-linux-gnu -mcpu=mips3 -target-abi o32 < %s | FileCheck %s -check-prefixes=MIPS3-O32
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yingopq wrote:

OK, applied.

https://github.com/llvm/llvm-project/pull/130558